11kV Cable Terminations – How To Perform Perfect Preparation Of The Semicon Cutback

Published 02 Feb 2018

Images: David Baldock (HV Cable Jointer)

• Application: 11kV Cable Terminations
• Cable Preparation : Semicon Cutback On 11kV XLPE Insulated Cables (Easy-Peel)
• Cable Jointer: David Baldock (HV Jointer)
• Product Category: MV HV Power Cable Terminations

• by Chris Dodds T&D - estimated reading time 2 minutes 

11kV Terminations

Prior to the installation of MV-HV cable accessories whether it be heat shrink, cold shrink or separable connectors, it is critical that careful and accurate semicon workmanship is achieved by the Jointer. The treatment and cut of the semicon screen by the 11kV jointer is essential to the stability and service of all joints, terminations and connectors on 11kV/33kV power systems.

The above cable preparation images clearly shows the straight and clean cut to the black semicon screen stepping down onto the 11kV cable insulation (XLPE) – here a constant force spring provides a straight edge for copper tape screen on the 11kV cable before installing the cable termination.

Semicon cutback has been enabled by the innovation and development of dedicated cable jointers tools which should provide precision engineered cable preparation.

However, jointers tools alone without the knowledge, expertise and skill of a Competent Jointer to use them are not worth diddly squat.

For instance the photograph below highlights the problem of unskilled labour, even if equipped with the correct cable jointing tools, inflicting catastrophic damage to MV-HV power systems through lack of training, experience and understanding of the criticality of semicon cutback.

Non-radial, rough and jagged semicon screens with protuding points at the cutback will cause cable termination or joint failure. Outage. Blackout.

Meet The Cable Jointer

David Baldock is an experienced LV-HV cable jointer up to and including 33kV specialising in electrical cable installation and repair to medium/high voltage power cables including XLPE, PILC, PILC/SWA, PICAS and EPR. Ranging in cable sizes from 25sqmm to 800sqmm and covering single cores to 3 cores with copper tape screen and wire screen.

Qualified and Competent to carry out all MV-HV cable terminations such as Tyco-Raychem, Nexans, Pfisterer, 3M, Euromold and ATEX Euromold cable terminations covering all heatshrink and cold shrink terminations.

➡ The Semicon Screen – A Most Critical Point In Any MV Cable Joint, Termination Or Connector – Read Blog

11kV Terminations, Joints & Connectors

Thorne & Derrick are national distributors of Cable Installation, Jointing, Substation & Electrical Safety Equipment MV HV – we service UK and global businesses involved in cable installations, cable jointing, substation earthing, overhead line and electrical construction at LV, 11kV, 33kV and EHV.

Joint | Terminate | Connect Medium & High Voltage Cables MV HV

Invitation

Thorne & Derrick invite you to join LinkedIn’s largest LV-HV Electrical Discussion Group : Low & High Voltage Power, Cabling, Jointing & Electricals. 

Discussion subjects include cable installations, cable jointing, substation, overhead line and electrical construction at LV, 11kV, 33kV and EHV. Network, engage and promote your profile, company or products with over 10,000 influencers.

Further Reading

• Alroc – Cable Jointing Tools Size: 264.62 KB
• Boddingtons – Cable Jointing Tools Size: 5.61 MB
• Utility Tool – Cable Jointing Tools Size: 7.02 MB